/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "hal_watchdog.h"

VOID WdtEnable(VOID)
{
    if (REG32_READ(RTC_WDT_CFG0) & (1 << RTC_CNTL_WDT_EN)) {
        return;
    }

    if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
        REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
    }

    REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
    REG32_WRITE(RTC_WDT_CFG0, (RTC_CNTL_WDT_SYS_RESET << RTC_CNTL_WDT_STG0));
    REG32_WRITE(RTC_WDT_CFG0, (RTC_CNTL_WDT_SYS_RESET_MASK << RTC_CNTL_WDT_SYS_RESET_LENGTH));
    REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
    REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
    REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_EN));
    REG32_WRITE(RTC_WDT_PROTECT, 0);
}

VOID WdtDisable(VOID)
{
    if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
        REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
    }
    REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
    REG32_WRITE(RTC_WDT_CFG0, (0 << RTC_CNTL_WDT_STG0));
    REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
    REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
    REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_EN));
    REG32_WRITE(RTC_WDT_PROTECT, 0);
}

VOID WdtFeed(VOID)
{
    if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
        REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
    }
    REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
    REG32_WRITE(RTC_WDT_PROTECT, 0);
}

void IoTWatchDogEnable(void)
{
    WdtEnable();
}

void IoTWatchDogKick(void)
{
    WdtFeed();
}

void IoTWatchDogDisable(void)
{
    WdtDisable();
}
